牛津版英语必修5 unit3 Science versus nature--Word Power-豆柴文库

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Unit3Scienceversusnature
Teachingplanof“WordPower”
Teachingobjects:
learnprefixandsuffixandlearntoguessmeaningsbasedonprefixandsuffix
learnorgansofthebody
Teachingprocedures:
IPrefixesandsuffixes
StepILead-in
appear,novel,regular,respect
Wearegoingtohavesomequestions.Pleaseusethesewordstohelpyou,butyouneedtoaddsomeletterstothewordsfirst.
1)Youcannotfindyournewpen.Whathappenedtoyourpen?Itdisappeared
2)ManypeoplerespectMr.Liandthinkheisagoodman.Hehelpspeopleoutandisagoodcitizenandfriend.SocanyoufindawordtodescribeMr.Li?
Respectable
3)MissWanghaspublishedseveralbooks.Shelovesherjobwritingnovels.SowhatisMissWang’soccupation(职业)?Sheisanovelist
4)Youcannotfindtheorderofthenumbersinagroupofmembers.Socanyoufindawordtodescribetheorderofthenumbers?irregular
StepIIIntroduction
independence


independence
prefix(前缀)root(词根)suffix(后缀)
Prefix:agroupoflettersthatisaddedtothebeginningofawordtochangeitsmeaning.
Suffix:aletteroragroupoflettersaddedtotheendofawordtomakeadifferentword.
Attention!
Usuallyaprefixwillchangethemeaningofword,whileasuffixwillchangethepartofspeechofaword.
StepIIIPrefixes
Sometimesyoucanguesswhatawordmeansbylookingatitsprefixorsuffix.Lookattheexamplesandworkoutthemeanings.
PrefixExampleMeaninganti-anti-cloning,anticanceragainst,opposedtodis-
un-disappear,disagree
unfair,unwillingnot,apposedof
in-
il-
im-
ir-incorrect,incomparable
illegal,illogical
immoral,immodest
irresponsible,irregular
not,without
pre-preview,preserveearly,beforepro-pro-cloninginfavourof,supportingre-recreate,repeat,renewagainStepIVAddinginformation
Someothercommonlyusedprefixes
PrefixExampleMeaningde-decompose,declassifyapart,frommal-maltreatment,malnutritionbadly,illnon-non-smoker,non-alcoholic,non-profitnotinter-international,interaction,interruptbetweentele-telescope,telegram,telecommunicationfarofftrans-transport,translate,transnationalacrossmis-misunderstand,mislead,misdeedwrongsub-subtitle,subway,submarineunderover-overeat,overwork,overacttoomuchtri-triangle,tricycle,trico